Electrode-holder



T. wlLLARn. ELECTRODE HOLDER. APPLICATION FILED JULY 2 5, 1919'- A YPatented Aug. 3, 1920.

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UNITED STATES THOMAS WILLARD, 0F SAN BRUNO, CALIFORNIA.

ELEc'rBoDE-HOLDEB.

Application ed July 25,

To all whom it may concern:

Be it known that I, THOMAS WILLARD, a

citizen of the United States, residing in the city of Sa'n Bruno, in thecounty of San Mateo and State of California, have invented a new anduseful Improvement in Electrode-Holders, of which the following is aspecification. My invention relates to improvements in holdersforelectrodes used in electric welding wherein an insulated member operatesin conjunctionwith a longitudinally movable metallic head to engage andretain an electrode.

The primary object of the present invention is to provide anew andimproved holder for weldingelectrodes.

It is also an object of the present invention to provide a new andimproved electrode holder of the character described having means formoving a member longitudinally to clamp an electrode between twometallic members. v

A still further object of the invention is to provide insulated membersfor holding and operating the movable part of said holder therebyreducing to a minimum the possibility and danger of contact of theoperator with the metallic holder.

I accomplish these and other objects by means of the improved devicedisclosed in the drawings forming a part of the present specification,wherein like characters of reference are used to designate similar artsthroughout the said specification and rawings, and in which- Figure l'isan elevation'of my improved device;

Fig. 2 is a vertical longitudinal sectional view thereof;

Fig. 3 is a broken elevation of one end of the device disclosing themanner in which an electrode is clamped in position; and

Fig. 4 isa plan view of Fig. 3.

4Referring to the drawings, the numeral 1 is used to designate aninsulated member, preferably cylindrical in shape, provided with acentral longitudinal bore 2'and a metallicl cap 3 on one end thereof.

A yrod 4 having a threaded portion 6 is slidably mounted within thecentral bore 2 of the member 1 and is provided with a suitable key 7which engages the metallic cap 3 \to .prevent rotation of said rod 4relatively Specification of Letters Patent.

portions -w of the Patented Aug. 3, 1920. '1919. serial No. 313,929. i

to the cap 3 and member 1. The rod 4 is also provided at one end thereofwith a me# tallic head 8 equal in diameter to the diameter of the cap 3.The other end o f the. rod is provided with a suitable socket 9 toengage the end of a suitable metallic conductor 11.

An insulated handle 12 is provided with a tubular extension 14 having acentral -bore 15 and extending within the central bore 2 of themember 1. The extension 14 is provided with a threaded sleeve 16whichengages the threaded portion 6 of the rod 4.

The handle 12 is rotatably mounted within or connected to the member 1by means of ferrules 17 and 18 mounted upon the handle 12 and member l,respectively, and provided with inwardly turned annular flanges whichare rotatably engaged by an outwardly faced annular channel 19 wherebysaid lloiandle 12 may rotate relatively to the memer 1.

-The bore 15 of the handle 12 is provided with an enlarged portion 2lwithin which the socket 9 of the rod 4 may move longitudinally.

` In operation the conductor 11 is connected to the rod 4 by means ofthe socket 9. The handle 12 is rotated relatively to the mem ber 1 whichwill cause the threaded sleeve 16, in'engaging relation with thethreaded portion 6v of the rod. 4, to move said rod 4 longitudinally andthereby move the head 8 away from or toward the metallic cap 3 on theends vof th'e inember 1 and thereby release or clamp an electrode 22between said head rod 4 is not rotated with the handle 12 but movedlongitudinally. within the'member 1 by said rotation.

From the foregoing it is evident that I have provided a new and improvedelectrode be rotated to release or engage the electrode 22 withouttwisting the conductor 11 as the holder for electric welding whereinonly a small portion of charged metallic surface is exposed to contactwith the operator. It is also obvious that said electrodeV may be easilyreleased without contact with the metallic portions of the holderthereby reducing to a minimum the possibility of Contact of the operatorwith the electrically charged portion of the device.

Having thus described my invention what 'I claim as new and desire tosecure by Letthe rod and head longitudinally within the member to engageand retain I`an electrode between said head and cap.

2. An electrode holder for electric welding comprising an insulatedmember having a metallic cap on one end thereof; a threaded metallic rodslidably mounted within said member and cap and having a metallic headon the outer end thereof; means for connect- 4 ing a metallic conductorto the other end of the rod; and insulated means rotatably mounted uponthe insulated member and engaging the threaded portion of the rod ingcomprising an insulated member having a central bore and a metallic capon one end thereof; a threaded rod slidably mounted Within said centralbore and having a metallic head thereon; means for preventing rotationof the rod and head relatively to the cap and insulated holder; and aninsulated handle rotatably connected to the insulated member and havinga tubular extension extending within the bore of the member and engagingthe threaded portion of the rod whereby rotation of said handle willmove the rod and head longitudinally within the member to engage andretain an electrode between said head and metallic cap.

In witness whereof I hereunto set my signature.

THOMAS WILLARD.

